Context open rotors: wind turbines, marine propellers, ...
Funding DGA AEROAC and ANR PIBE (Prédire l'Impact du Bruit des Eoliennes).
Postdoc David Raus (2019-2021) and PhD thesis Lisa Sicard (2020-...) Collaboration with Michel Roger, Emmanuel Jondeau and Pascal Souchotte of LMFA at Ecole Centrale de Lyon.
|Dynamic stall noise measurement setup in the anechcoic chamber of Ecole Centrale de Lyon||Spectrogram of the noise for a NACA 0012 airfoil oscillating at a frequency of 0.66Hz between 0 and 30 degrees (means angle of attack of 15 degrees, Reynolds of 200,000)|
PhD thesis of Yuan Tian (MESR 2012-2016)
Trailing edge noise and turbulent inflow noise - Effects of wind shear and atmospheric turbulence
|Third octave band spectrum of sound power level meaured by DTU and calculated (left), and horizontal directivity of wind turbine overall sound pressure level (right) in a neutral atmosphere (Tian and Cotté, 2016)|
Need to account for the motion of the blades and to the source to correctly predict the amplitude modulation of wind turbine noise.
Also, the size of the shadow zone is overpredicted when the point source approximation is used.
|Maps of the overall sound pressure level with the Amiet-PE extended source model (left) and with the pouint source approximation (right) in a neutral atmosphere (Cotté, 2019)|
Funding ANR: visit project website at https://www.maesstro.cnrs.fr/
Postdoc Benjamin Elie (2019)
| Block-diagram of the MAESSTRO software architecture.
(Elie et al., ISMA 2019)
Funding DGA - Postdoc Augustin Parret-Fréaud (2014-2016)
| Real and imaginary parts of the complex Young's modulus measured by Collet et al. (2013) and of the associated digital filter response
(Parret-Fréaud et al., MSSP 2016)
| Example of vibration localization measured on an upright piano soundboard
(Chaigne et al., J. Acoust. Soc. Am. 2013)